15
CONVENTIONAL DETECTORS
In the case of heat detectors a fast test is
defined as a sample which recognises a
rise of 10°C within one minute. Since
sampling takes place every 2 seconds an
Orbis heat detector will respond within
about 4 seconds.
Smoke or Heat Testing
Smoke or heat testing Orbis detectors is
aided by the FasTest® feature. A detector
will react rapidly to the correct stimulus if
applied within 4 minutes after power up.
Choose the appropriate test function on
the control panel and reset the detector
circuit. This should place the detectors
into FasTest®. Apply smoke or heat as
appropriate and the detector should
enter the alarm state within 4 seconds.
The panel may sound the alarm and reset
the zone automatically (refer to control
panel’s instructions). If not, silence the
alarm and reset the panel. Repeat the
procedure as necessary.
Note that the multisensor detector will
respond to either smoke or heat while
in FasTest®.
MAINTENANCE AND
SERVICING
Detectors should be checked regularly
at the intervals indicated by the locally
applicable code of practice. Apollo
recommends that detectors be checked
at least once a year.
One of the features of Orbis is FasTest®
which makes it possible to carry out
a functional test, using smoke or heat,
within about four seconds. If detectors
appear not to be functioning correctly
they should be returned to Apollo for
testing.
If detectors are externally dirty they
can be cleaned carefully with a damp
cloth using a small amount of industrial
alcohol.
DirtAlert™
Orbis detectors have drift compensation
to compensate for changes caused by the
environment. The most usual change is
contamination.
If the detector is dirty to the point where
it can no longer compensate, its LED
will flash yellow while it is in StartUp.
Maintenance checks should therefore
include removing a detector from its base
and re-inserting it or pressing reset on the
panel to initate StartUp.
COMMMISSIONING
MADE EASY
Orbis has been designed with a number
of features that make commissioning
easier and that save time.
StartUp
When Orbis detectors are powered up
they automatically enter a phase known
as StartUp and in which they stay for 4
minutes. After this they revert to normal
operation. If the detector is reset, ie, if
power is disconnected for one second
or longer, the detector will always enter
StartUp for the first four minutes after
power has been restored. The detector
LED flashes red once a second to indicate
that it is in StartUp.
What StartUp indicates
StartUp is used to check that the positive
and negative cables are connected in the
correct polarity and that power has been
applied to the detector. If this is the case,
the LED will flash red once a second.
StartUp will not check whether the IN+
and OUT+ connections have been
transposed. This is not a problem if
standard bases are used as the detector
will operate normally.
If, however, diode bases are used and
a detector is removed from a base with
transposed positive connections none
of the detectors beyond this point will
operate.
FasTest®
Orbis detectors incorporate a test facility
known as FasTest®.
In normal operation Orbis smoke
detectors do not change to the alarm
state at the first sensing of smoke. If
they did, they could be too sensitive and
cause false alarms. Algorithms determine
the point at which the detector changes
to alarm.
This could slow down routine
maintenance during which detectors are
tested by means of smoke or a smoke-
simulating substance.
In order to avoid such a problem Orbis
detectors have FasTest, a facility which
is automatically available during StartUp
and which modifies algorithms so that
testing is possible within 4 seconds.
The problem of testing is even more
acute in the case of heat detectors as they
absorb a great deal of heat during testing.
Orbis heat detectors also incorporate
FasTest®.
A flashing yellow LED is not a sign
that the detector needs to be replaced
immediately. The decision to replace
should be taken by the service engineer,
taking the environment of the detector into
account. If the detector is not replaced it
will evenually cause false alarms.
When deciding how long to leave the
detector on site in such a case, the
following rule of thumb may be used:
installation time + 25%
For example, if a detector had been
installed for four years when the LED
flashed yellow, it could be left in place
for up to 12 months.
Dirty detectors can be returned to Apollo
for cleaning and recalibration.
APPROVALS AND
REGULATORY
COMPLIANCE
The Orbis range of detectors is approved
by a large number of certification bodies.
These include approvals to EN54:200
with LPCB, Vds, DIBT, BOSEC and FG.
For further information on approvals held
by Apollo contact the Sales Department
or visit our website (details on page 2).
EU DIRECTIVES
Orbis complies with the requirements of
a number of European New Approach
Directives such as the EMC Directives
2004/108/EC and the Construction
Products Directive 89/106/EEC. Visit
the Apollo website to download EC
certificates of conformity issued by
the Notified Body, LPCB. Copies of
Declarations of Conformity issued by
Apollo for all applicable New Approach
Directives are available on the Apollo
website or from Apollo on request.
All Orbis products comply with the
marking requirements of the WEEE
Directive, 2002/96/EC. For further
information on disposing of applicable
electrical and electronic waste contact
Apollo.
